﻿using SlamDunk.CMS.Model.DataModel;
using System;
using System.Collections.Generic;
using System.Configuration;
using System.Data;
using System.Data.SqlClient;
using System.Text;
using SD.Common.PoweredByLee;

namespace SlamDunk.CMS.DAL
{
    public class LinkCategoryDal
    {
        #region # 静态构造器

        /// <summary>
        /// SqlHelper
        /// </summary>
        private static readonly SqlHelper _SqlHelper;

        /// <summary>
        /// 静态构造器
        /// </summary>
        static LinkCategoryDal()
        {
            _SqlHelper = new SqlHelper(ConfigurationManager.ConnectionStrings["CMS"].ConnectionString);
        }

        #endregion

        #region 01.添加方法
        /// <summary>
        /// 添加一个实体对象
        /// </summary>
        /// <param name="linkCategory">要添加的实体对象</param>
        /// <returns>添加完毕后的实体对象</returns>
        public LinkCategory Add(LinkCategory linkCategory)
        {
            string sql = "INSERT INTO LinkCategories (CategoryName, Sort, DelFlag, AddTime)  output inserted.Id VALUES (@CategoryName, @Sort, @DelFlag, @AddTime)";
            SqlParameter[] args = new SqlParameter[] {
                new SqlParameter("@CategoryName", ToDBValue(linkCategory.CategoryName)),
                new SqlParameter("@Sort", ToDBValue(linkCategory.Sort)),
                new SqlParameter("@DelFlag", ToDBValue(linkCategory.DelFlag)),
                new SqlParameter("@AddTime", ToDBValue(linkCategory.AddTime)),
            };
            //根据newId返回新添加的实体对象
            int newId = (int)_SqlHelper.ExecuteScalar(sql, args);
            return this.GetModel(newId);
        }
        #endregion

        #region 02.删除方法（物理删除）
        /// <summary>
        /// 删除一个实体对象
        /// </summary>
        /// <param name="id">要删除的实体对象Id</param>
        /// <returns>受影响的行数</returns>
        public int PhysicalDelete(int id)
        {
            string sql = "DELETE FROM LinkCategories WHERE Id = @Id";
            SqlParameter arg = new SqlParameter("@Id", id);
            return _SqlHelper.ExecuteNonQuery(sql, arg);
        }
        #endregion

        #region 04.修改方法
        /// <summary>
        /// 修改一个实体对象
        /// </summary>
        /// <param name="linkCategory">构造好的要修改的实体对象</param>
        /// <returns>受影响的行数</returns>
        public int Update(LinkCategory linkCategory)
        {
            StringBuilder sql = new StringBuilder();
            sql.Append("UPDATE LinkCategories SET CategoryName = @CategoryName");
            sql.Append(", Sort = @Sort");
            sql.Append(", DelFlag = @DelFlag");
            sql.Append(", AddTime = @AddTime");
            sql.Append(" WHERE Id = @Id");
            SqlParameter[] args = new SqlParameter[] {
                new SqlParameter("@Id", linkCategory.Id)
                ,new SqlParameter("@CategoryName", ToDBValue(linkCategory.CategoryName))
                ,new SqlParameter("@Sort", ToDBValue(linkCategory.Sort))
                ,new SqlParameter("@DelFlag", ToDBValue(linkCategory.DelFlag))
                ,new SqlParameter("@AddTime", ToDBValue(linkCategory.AddTime))
            };
            return _SqlHelper.ExecuteNonQuery(sql.ToString(), args);
        }
        #endregion

        #region 05.根据主键获取单个实体对象
        /// <summary>
        /// 根据主键获取单个实体对象
        /// </summary>
        /// <param name="id">主键</param>
        /// <returns>单个实体对象</returns>
        public LinkCategory GetModel(int id)
        {
            string sql = "SELECT * FROM LinkCategories WHERE Id = @Id";
            using (SqlDataReader reader = _SqlHelper.ExecuteReader(sql, new SqlParameter("@Id", id)))
            {
                if (reader.Read())
                {
                    return ToModel(reader);
                }
                else
                {
                    return null;
                }
            }
        }
        #endregion

        #region 06.获取实体对象集合
        /// <summary>
        /// 获取实体对象集合
        /// </summary>
        /// <returns>实体对象集合</returns>
        public List<LinkCategory> GetModelList()
        {
            List<LinkCategory> list = new List<LinkCategory>();
            string sql = "SELECT * FROM LinkCategories WHERE DelFlag = 0 ORDER BY Sort DESC";
            using (SqlDataReader reader = _SqlHelper.ExecuteReader(sql))
            {
                while (reader.Read())
                {
                    list.Add(ToModel(reader));
                }
            }
            return list;
        }
        #endregion

        #region 07.获取总记录条数
        /// <summary>
        /// 返回总记录条数
        /// </summary>
        /// <returns>总记录条数</returns>
        public int GetCount()
        {
            string sql = "SELECT COUNT(*) FROM LinkCategories WHERE DelFlag = 0";
            return (int)_SqlHelper.ExecuteScalar(sql);
        }
        #endregion

        #region 08.分页获取实体对象集合
        /// <summary>
        /// 分页获取实体对象集合
        /// </summary>
        /// <param name="start">起始行</param>
        /// <param name="end">终止行</param>
        /// <returns>实体集合</returns>
        public List<LinkCategory> GetModelList(int start, int end)
        {
            List<LinkCategory> list = new List<LinkCategory>();
            string sql = "SELECT * FROM (SELECT *, ROW_NUMBER() OVER(ORDER BY Sort DESC) AS RowIndex FROM LinkCategories WHERE DelFlag = 0) AS t WHERE RowIndex >= @start AND RowIndex <= @end";
            using (SqlDataReader reader = _SqlHelper.ExecuteReader(sql, new SqlParameter("@start", start), new SqlParameter("@end", end)))
            {
                while (reader.Read())
                {
                    list.Add(ToModel(reader));
                }
            }
            return list;
        }
        #endregion

        #region 17.根据IDataReader对象返回实体对象方法
        /// <summary>
        /// 根据IDataReader对象返回实体对象方法
        /// </summary>
        /// <param name="reader">IDataReader对象</param>
        /// <returns>实体对象</returns>
        public LinkCategory ToModel(IDataReader reader)
        {
            LinkCategory linkCategory = new LinkCategory();
            linkCategory.Id = (int)ToModelValue(reader as SqlDataReader, "Id");
            linkCategory.CategoryName = (string)ToModelValue(reader as SqlDataReader, "CategoryName");
            linkCategory.Sort = (int)ToModelValue(reader as SqlDataReader, "Sort");
            linkCategory.DelFlag = (bool)ToModelValue(reader as SqlDataReader, "DelFlag");
            linkCategory.AddTime = (DateTime)ToModelValue(reader as SqlDataReader, "AddTime");
            return linkCategory;
        }
        #endregion

        #region 18.C#值转数据库值空值处理
        /// <summary>
        /// C#值转数据库值空值处理
        /// </summary>
        /// <param name="value">C#值</param>
        /// <returns>处理后的数据库值</returns>
        public object ToDBValue(object value)
        {
            if (value == null)
            {
                return DBNull.Value;
            }
            else
            {
                return value;
            }
        }
        #endregion

        #region 19.数据库值转C#值空值处理
        /// <summary>
        /// 数据库值转C#值空值处理
        /// </summary>
        /// <param name="reader">IDataReader对象</param>
        /// <param name="columnName">列名</param>
        /// <returns>C#值</returns>
        public object ToModelValue(IDataReader reader, string columnName)
        {
            if (reader.IsDBNull(reader.GetOrdinal(columnName)))
            {
                return null;
            }
            else
            {
                return reader[columnName];
            }
        }
        #endregion
    }
}
